The rare condition can cause mild flu-like symptoms but could lead to organ failure and death.
People swimming in freshwater are at risk of developing the disease, if any urine or blood from infected animals is in the water.
It could also be caused by the eyes, mouth, nose, or open cuts coming into contact with contaminated soil, or if bitten by an infected animal.
Kim Ingleby, a motivational mind and body coach, was diagnosed with suspected Weil’s Disease in 2013.
Suffering from the condition tested “all parts of her life”, she said.
Doctors believed she contracted the disease while swimming in open water, as part of a triathlon.
“After the triathlon, there were flu-like symptoms for about 10 days,” Ingleby told Express.co.uk.
“Then, in the space of three to four hours, I went from the flu-like symptoms, to not knowing where I was, or who I was.
“I was hot, and my heart rate went up. I was just suddenly not okay.”
Weil’s Disease is a severe form of leptospirosis, and symptoms vary from person to person. Mild symptoms include chills, muscle aches, vomiting and headaches.
But, the condition can lead to more extreme complications, including shortness of breath, coughing up blood, a confused mental state, seizures and a painful swelling of the liver.
“The symptoms lasted a while, and it really affected my nervous system, liver and kidneys,” said Ingleby.
“I gained a lot from it, though. It made me see life differently.
“It was incredibly challenging. It tested all parts of my life.”
Ingleby was given antibiotics to help treat the Weil’s Disease. She also ate the right foods to help the body recover, including vegetables, high-quality protein, and lots of water, added.
She is still on-the-mend from the debilitating condition, she said. But, she is now motivating people with other rare conditions to continue fighting. She even led a Tedx Talk in Bristol on overcoming adversity.
The risk of developing Weil’s Disease can be cut by wearing waterproof shoes, goggles and gloves when working with animals.
There’s currently no vaccine for humans to prevent the condition.